Locking mechanism



Dec. 3, 1935 G. D. HILL LOCKING MECHANISM Filed Oct. 15, 1932 4 Sheets-Sheet l Dec. 3, 1935. G. D. HILL LOCKING MECHANISM 4 Sheets-Sheet 2 Filed Oct. 15, 1932 Dec. 3, 1935. e. D. HILL LOCKING MECHANISM 7 Filed Oct. 15, 1952 4 Sheets-Sheet 4 W 13 65 ye z; 60 74:0 .4; v45 50 35 T17 4/ 66 IN VEN TOR Zer-ri Z ffL'ZL Zz ATTORNEY Patented Dec. 3, 1935 UNITED STATES PATENT OFFICE- LOCKING MECHANISM Application October 15, 1932, Serial No. 637,962

13 Claims.

The present invention relates to lock mechanism and has for its object to provide an improved combination lock embodying a simplified and compact arrangement of parts designed to protect the closures of different receptacles, compartments, and the like.

A further object of the invention is to provide an improved lock of this class designed to facilitate quick operation of the combination whereby to reduce the time required to open the various receptacles or compartments to which the locks may be applied.

A further object of the invention is to provide an improved combination lock having different bolt protecting mechanisms corresponding to difierent combinations and arranged to be released by operating either combination.

A further object of the invention is to provide an improved combination lock for protecting a bolt or other locking means embodying a plurality of sets of tumblers corresponding to different combinations and having fence means for each set of tumblers in which arrangement one of the tumblers is effective to control the movement of the bolt under operation of either combination.

A further object of the invention is to provide a combined individual and master combination lock whereby various similarly contructed locks may each be set up for operation by different individual combinations and also successfully operated by a master combination common to all of the looks.

A further object of the invention is to provide an improved combination lock in which different tumbler mechanisms are provided with corresponding fence means and are mounted in a barrel for controlling a bolt movable therein and in which arrangement one of the tumblers is adapted to control the movements of the different fence means and the bolt upon operation of either combination.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Fig. 1 is a front elevation illustrating the application of the lock to a closure;

Fig. 2 is a top plan view of the same;

Fig. 3 is a rear elevation partly in section showing the bolt in looking engagement with the keeper;

Fig. 4 isa part sectional elevation showing the application of the lock casing and the operating dial to the closure;

Fig. 5 is a front view of the lock shown removed from the closure;

Fig. 6 is a front view of the combined tumbler 5 and fly by means of which the master combination can be changed from time to time;

Fig. 7 is a rear elevation of the lock barrel or casing with the cover plate removed showing the bolt in looking position and the fence elements in withdrawn from the notches of the tumblers;

Fig. 8 is a similar View in which the notches of the individual set of tumblers have been alined by the successful operation of the individual combination, the corresponding fence being shown 15 within said notches and the bolt being ready for release;

Fig. 9 is a similar view showing the bolt in released position;

Fig. 10 is a rear View of the tumbler barrel with the tumbler retaining element and tumblers omitted;

Fig. 11 is a side View of the barrel as seen from the top of Fig. 10;

Fig. 12 is a rear elevation of the barrel with the cover. plate removed in which the notches of the master set of tumblers have been alined by the operation of the master combination, the corresponding fence being shown within said notches and the bolt being ready for release;

Fig. 13 is a similar view showing the bolt in released position;

Fig. 14 is a transverse sectional elevation through the lock casing or barrel showing the relationship of the two sets of tumblers and the fence elements corresponding thereto;

Fig. 15 is a rear elevation of the tumbler barrel with the tumblers of one set shown in registering relation therein;

Fig. 16 is a transverse section through the lock taken approximately on line Ilia-Ilia of Fig. 12;

Fig. 17 is a view illustrating the tumblers and spacing members therefor corresponding to the master combination;

Fig. 18 is a similar view illustrating the tumblers and spacing members therefor corresponding to the individual combination;

Fig. 19 is a side view of a driving unit for the master and ndividual sets of tumblers which is keyed to the spindle as shown in Fig. 16;

Fig. 20 is a front elevation of the bolt showing the fence elements thereon;

Fig. 21 is a longitudinal section through the bolt taken on line 2 I a-Zl a of Fig. 20;

Fig. 22 is a fragmentary sectional view illus- 2 trating the operating position of the change key with respect to one of the tumblers corresponding to the master combinaton;

Fig. 23 is a similar view showing the operating position of the change key corresponding to the individual set of tumblers;

Fig. 24 is a view of a portion of the change key shown in Fig. 22; and

Fig. 25 is a view of a portion of the change key shown in Fig. 23.

The same reference numerals throughout the several views indicate the same parts.

The present invention comprises locking mechanisms for guarding the doors or closures of various receptacles, compartments, and the like, and particularly those of the type which are generally grouped together for use by different individuals and usually under the control of an attendant with authority to open the same when desired. The invention embodies a locking or protecting mechanism of the permutation or combination type which includes a tumbler arrangement under the control of suitable operating means such as a dial or its equivalent. At least one of the tumbler mechanisms and the controlling dial and spindle therefor is designed for quick operation, as by a partial revolution of the dial for each of the setting up operations, or by a direct movement from one number of the combination to another, thus permitting the combination to be operated in a minimum of time.

One application of the present locking mechanism is to the drawers of school desks, each of which may be provided with the same type of lock, the different locks being set for release by the operation of different individual combinations entrusted to the different students to which the desks are assigned and all of the locks being designed for release by the operation of a master combination unknown to the studentsand entrusted to one or more persons having authority to open the drawers of the various desks from time to time. One advantage of this arrangement is that an oflicer or attendant when desiring to open the drawers or other closures, instead of having to remember all of the different individual combinations or having to refer to a list of the same may quickly and readily open any or all of the closures by the operation of a single master combination entrusted to him.

Referring to the drawings, 10 represents a portion of a receptacle or container of any preferred type having a suitable closure ll constructed in any desired manner and to which one form of the improved lock mechanism is shown applied as indicated in Fig. 3. In this arrangement the wall of the receptacle is provided with a keeper 12 for receiving the locking bolt I3 of the particular lock shown. The closure H may constitute the drawer of a desk or the door of a locker or any preferred form of protecting means for safe-guarding various articles. The closure I l is recessed at its rear side to receive the looking mechanism as shown in Fig. 16. The locking mechanism is carried by a suitable support preferably comprising a casing in the form of a barrel [4 having a rear end cover plate l5 provided with a forwardly extending plate-like portion 15a disposed substantially flush with the top of the closure as shown in Fig. 4 and serving as guide means for the bolt l3.

The cover plate 15 is connected with the barrel by means of suitable bolts or rivets l6 and is also connected with the closure H by means of screws ll extended through holes Ila in the plate,

shown in Fig. 5. The screws take into lugs [8 extending rearwardly from the escutcheon plate I9 into openings formed in the wall of the closure II as shown in Fig. 16.

The escutcheon plate 19 is provided with the usual index 28 for cooperation with the numbers on the dial 2| for operating the spindle 22 which is rotated to effect successful operation of the different tumbler mechanisms as hereinafter described. The escutcheon plate is also provided with index marks 2flaand 26b for use when operating the dial to change the individual and master combinations as described hereinafter.

The two sets of tumblers corresponding to the master and individual combinations are shown respectively in Figs. 17 and 18 and each set is rotatably supported within the barrel through engagement of the peripheral portions of the tumblers with the surrounding wall of the barrel in which the bolt 13 is slidably mounted.

The tumblers of the master combination and their'spacing elements, in the order in which they are placed within the barrel from front to rear, are indicated by the reference characters 23 to 28 inclusive, as shown in Fig. 17, while the tumblers and the spacing elements of the individual combination are indicated, from front to rear, by the reference characters '29 to 35 inclusive, as shown in Fig. 18, the member 36 being the retaining element for the various tumblers and spacing elements.

It will be seen that there are three tumblers in the set corresponding to the master combination and four in the set corresponding to the individual combination, but it will be understood that the number of either set may be varied as desired.

The master tumblers are indicated by the reference characters 23, 25, and 21 and the individual tumblers by the reference characters 29, 3|, 33 and 35. The various spacing elements located between the tumblers are held against rotation by means of the lugs 31 thereon which are extended within a slot 38 formed in the wall of the barrel as shown in Fig. 15, this being true also of the yieldable or spring-like retaining element 36 which is sprung into a groove 39 formed in the wall of the barrel as shown in Figs. 10 and 14.

All of the tumblers, except the fence operating and bolt actuating tumbler 35, are mounted for rotation relative to the spindle 22 in the setting up operations of the different combinations. A driving unit, Fig. 19, is provided for the two sets of tumblers and comprises a tubular section 40 having bearings ll and 42 at its front and rear ends respectively, which are journaled in the front and rear walls of the barrel M, as shown in Fig. 16. The tubular member 40 has an enlarged annular portion 43 provided with teeth 43a which intermesh with similar teeth on the driving section 44 of the unit which is sleeved on the section 40 and held in adjusted position thereon by a spring 45 interposed between the section 44 and a collar 46 fixed on the section 40. The tubular section 40 is adapted to receive the spindle 22 and is provided with a pin 41 which extends within a slot 48 formed in the spindle, as shown in Fig. 16, whereby upon rotation of the spindle the parts 43 and 44 of the driving unit will likewise be rotated. The slot 48 in the spindle permits the latter and the dial thereon to be readily removed from the look upon removal of the escutcheon plate from the wall of the closure.

The front tumbler 23 of the master set is provided with a tongue-like portion 23a by which the tumbler is driven through engagement of said portion with a lug 49 on the annular portion 43 of the driving unit through which the pin 47 is preferably extended, as shown in Fig. 16. The tumbler 23 serves to drive the next adjacent t bler through engagement of the pin 231) on the former with the pin 25b on the latter. The tumbler 21 has a fly 21a rotatably adjustable thereon to permit of a change in the set-up of the master combination when desired. The tumbler 2''! is driven through engagement of the pin 25c on the tumbler 25 with the part Zlb of the fly. The pin 250 on the tumbler 25 is preferably made integral with the pin 25b of said tumbler as shown in Fig. 16. The fly is held in position upon the tumbler 27 by a retaining ring 270, the ring having a hub-like portion extended through the tumbler and provided with a flange engaging the rear side of the tumbler as shown in Fig. 16. The part 211) of the fly is formed of spring material and has an offset portion 2103 which takes into one or another of the openings or depressions 21c formed in the tumbler 21 as shown in Fig. 6. The fly is held in the diiferent positions to which it may be adjusted in changing the master combination by frictional engagement of the offset portion 21d with the wall of the tumbler 2! when said oifset portion is within one of the openings 216. The method of effecting relative adjustment of the fly and the tumbler to change the master combination will be described hereinafter.

The master tumblers 23 and 25 are separated by the spacing element 24 and the tumblers 25 and 21 by the spacing element 26, the latter being made relatively thick; as shown in Fig. 16, in View of the mounting of the fly and its retaining element on the tumbler 21.

The individual set of tumblers and the interposed spacing elements are mounted within the barrel, from front to rear, in the order indicated by the reference characters 29 to inclusive in Fig. 18. In this arrangement the tumbler 29 is driven through engagement of the tongue 29a thereon with the lug 55 on the sleeve 54 of the driving unit shown in" Fig. 19. This lug also serves to drive the tumbler 3i through its engagement with one or the other of the tongues 3la thereon and likewise operates to drive the tumbler 33 through engagement with one or the other of the tongues 33a on said tumbler. The

lug 50 also drives the rearmost tumbler 35 by be ing projected within the notch 35a formed therein. The tumbler 35 which operates the bolt and the fence elements, as described hereinafter, is directly driven by the spindle and the dial thereon whenever the latter is rotated to operate either combination, it being understood that the driving unit, Fig. 19, is considered as a part of the spindle.

As previously stated the member 35, shown in Fig. 18, constitutes a retainer for the tumblers and spacing elements mounted within the barrel and is secured by springing it into the groove 39 of the barrel as shown in Fig. 14.

The tumblers 23, 25, and 27 of the master set are notched at 23;, 25f, and 2? respectively, as shown in Fig. 17, and the notches are brought into alinement by turning the dial to successfully operate the master combination.

The tumblers 29, 3!, and 33 of the individual set are notched at 29 3| and 33], respectively, as shown in Fig. 18, while the bolt operating tumbler 35 which is common to both sets is notched as shown at 35].

The notches of the tumblers 29, 3!, and 33 of the individual set, through cooperation of the driving lug 50, with the inwardly projecting tongues on said tumblers, are brought into registry by a partial revolution of the dial for each setting up operation required in the successful operation of the combination, which also requires that the notch in the bolt operating tumbler 35 be alined with the notches in the remaining tumblers of either set.

The bolt i3 is guided within the barrel through engagement of its laterally extending portions 5'! with the opposite guides 52 formed on the barrel.

The bolt has mounted on its opposite sides the fence elements 53 and 54 arranged to swing upon a common pivot member 55 suitably secured upon the bolt,. the fence 53 corresponding to the master set of tumblers and the fence 54 corresponding to the individual set of tumblers. The fence 53 is provided with a portion 53a adapted to take into the notches of the master set of tumblers and with a portion 53b arranged to move into the notch 35 of the bolt operating tumbler 35 upon successful operation of the master combination. The fence 53 is cut away at 530 to clear the individual set of tumblers when moving into the notches of the master set.

The fence 55 is provided with a portion 54a arranged to move within the notches of the individual set of tumblers and also within the notch 35/ of the bolt operating tumbler 35 when said tumbler notches are alined one with another. A spring 55, suitably secured upon the wall of the barrel, serves to move the portion 53a of the fence 53 within the notches of the master set of tumblers upon successful operation of the master combination and. a spring 51 operates to move the portion 55a of the fence 54 within the notches of the individual set of tumblers as well as within the notch 35) of the bolt operating tumbler 35 upon successful operation of the individual combination.

The fence 53 is slotted at 53 to receive the pivot member 55. By thus slotting the fence 53 relative movement between the latter and the bolt in a vertical direction is permitted whereby the bolt may be moved to release position upon successful operation of one set of tumblers while the other set and its fence remain in normal bolt protecting position. With the bolt in the locking position shown in Fig. 7, the fence 53 will rest on the relatively inclined shoulder 59 formed by cutting away the wall of the barrel, as best shown in Fig. 10, and in this position the bolt will be supported by the fence 54 through engagement of the portion 55a thereof with the underlying portion of the fence 53 in which position the parts are shown in Fig. '7.

Upon successful operation of the individual combination, the fence 54 will move into the notches of the tumblers corresponding thereto as indicated in Fig. 8. The bolt can then be moved to the release or unlocked position, shown in Fig. 9, in which the fence 53 remains seated upon the shoulder 59 of the barrel while the pivot member on the bolt will occupy a position within the lower end of the slot 58.

If on the other hand, the master combination is successfully operated, the fence 53 will move into the notches of the master set of tumblers as shown in Fig. 12, thus permitting the bolt to be moved to release position, as shown in Fig. 13 in which position the fence 54 will ride on the peripheral portions of the tumblers of the individual set as indicated by its dotted line position in Fig. l2.

1 with an abutment or lug BI With the bolt in either of the unlocked positions shown in Figs. 9 and 13, the turning of the dial to destroy the combination will cause a pin 60 on the tumbler 35 to move into engagement on the bolt to raise or move the latter to locking position.

In this operation a cam 62 on the tumbler 35 will engage the fence 54 if the bolt has been released by operation of the individual combination as shown in Fig. 9 and will move said fence out of the notches of the individual set of tumblers at the same time that the pin 63 on the tumbler 35 is operating through engagement with the lug 6| on the bolt to return the latter to locking position. However, if the bolt has been released by operation of the master combination as indicated in Fig. 13, then upon operating the dial to destroy the combination and to return the bolt to locking position, the cam 62 of the tumbler 35 will engage and move the fence 53 out of the notches of the master set of tumblers thus restoring'the fence to the position shown inFig. 7 in which it rests upon the shoulder 59 of the barrel and in po- It will be seen, therefore, that in returning the bolt to locking position that the pin 68 on the tumbler 35 when moving in engagement with the lug 51 on the bolt operates independently of the fence elements 53 and 54 which are restored to bolt protecting or looking position by the movement of the cam 62 in engagement therewith.

The belt is slotted at 63 to permit the rear end of the driving unit shown in Fig. 19 to project therethrough as shown in Fig. 16.

The wall of the barrel is recessed or cut away at 8 3 to aiford clearance for the head of the pivot member 55 on which the fence elements are mounted as best shown in Figs. 11 and 14.

The barrel has an opening 55 formed in its side wall for the reception of either of the change keys 66 or 61, shown in Figs. 2a and 25, provided for changing the master and individual combinations', respectively. The key 66 has a lug 68 thereon adapted to engage an abutment 69 on the wall of the barrel which affords a stop for limiting the turning movement of the key within the opening 65 and which also serves to limit the turning movement of the key 6? through engagement of the stop with a lug on said key. The key 63 has a bit 66a. thereon for engaging the tumbler 21 within the notch thereof, as shown in Fig. 22, when a change in the master combination is to be made.

Likewise the key 6? is provided with a bit 610. arranged to engage the tumbler 35 within the notch thereof as shown in Fig. 23 when a change in the individual combination is to be made.

In changing the master combination the key a quarter of a turn until it occupies the position shown in Fig. 22. Before doing this, however, the dial is turned to the right at least four revolutions, after which it is broug t to rest when the first number of the old combination is in registry with the index mark 28b on the escutcheon plate. The key at this time will have the lug 63 in engagement with the abutment 69 on the barrel in which position the key is held by the operator. The bit 66a on the key will engage the tumbler 21 within the notch thereof so that the tumbler will be held against rotation by the key. The dial will then be turned slowly toward the right and through engagement of the pin c on the tumbler 25 with the portion 21b of the fly the latter will sition to engage the bottom of the fence 54 I whereby to support the bolt in looking position.

66 will be inserted within the slot 65 and given be rotated. By counting the clicks'of the fly when i the part 21d thereof passes from one of the openings 21a in the tumbler to another, the operator will be able to readily effect the desired change in the master combination.

In changing the individual combination the notch in the tumbler is brought into registry with the key opening 65 formed in the wall of the barrel by turning the dial to aline the last number of the old combination with the index mark 20a on the escutcheon plate, after which the key is inserted in the opening 65 and given a quarter turn until the lug l0 thereon moves into engagement with the stop 69 on the barrel. The key is then held while at the same time the dial is turned slowly toward the left which results in rotation of the part 4% of the tumbler driving unit since the part 44 at this time is held against rotation by the tumbler '35 which in turn is held by the key'fi'l. In this turning movement the clicking of the teeth between the parts 40 and 44 of the driving unit will be audible, or can be detected by the sense of touch, each click indicating an advance of one number over the previous number of the combination. In this Way one or more numbers of the individual combination can be readily changed to afford the desired new combination and when the parts have been set to correspond to the numbers chosen the key is withdrawn from the barrel.

In the operation of the individual combination by the user of the desk the dial is turned to the left to position the first number of the combination in registry with the index 20. It is then rotated to the right for a partial revolution to position the second number of the combination in registry with said index and is then turned to the left a partial revolution to position the third number in registry with the index after which another partial revolution of the dial to the right completes the operation by aligning the fourth number with the index, whereby the fence corresponding to said set is permitted to move within the notches thereof to release the bolt.

In the operation of the master combination the 45 dial is rotated in the usual manner to line up the notches of the master set of tumblers to permit the fence corresponding to said tumblers to move into the notches thereof.

I claim:

1. Lock mechanism comprising supporting means, a locking element movable thereon and provided with an abutment, individual permutation mechanisms for protecting the locking element, each including tumblers and a fence element, said fence elements adapted for protecting the locking element against release through cooperation of one with another, common operating means for said permutation mechanisms disposed axially thereof, and means on one of the tumblers of one permutation mechanism adapted to cooperate with the abutment on the locking element to move the latter to locking position following successful operation of either of said mechanisms.

2. A combination lock comprising supporting means, a bolt movable thereon and provided with an abutment, axially disposed individual sets of notched rotary tumblers on the supporting means corresponding to different combinations, operating means for said tumbler sets, fence elements for guarding the bolt each corresponding to one set of tumblers and movable into the notches thereof upon successful operation of the combination corresponding thereto, said fence elements adapted for cooperation to hold the bolt against release when it is in looking position and operable one independently of another to release the bolt and means on one of the tumblers of one set adapted to engage the abutment on the bolt to move the latter in one direction after successful operation of either combination.

3. A combination lock comprising supporting means having a shoulder thereon, a bolt movable on the supporting means and provided with an abutment, individual sets of notched rotary tumblers on the supporting means corresponding to different combinations, operating means for said tumbler sets, fence elements arranged through cooperation one with another and with the shoulder on the supporting means to hold the bolt against release upon destroying either combination, each fence element corresponding to one set of tumblers and movable into the notches thereof upon successful operation of the combination corresponding thereto, means on one of the tumblers of one set adapted upon destroying either combination to move the corresponding fence out of the notches of its said tumblers, and means on the last mentioned tumbler adapted to engage the abutment on the bolt to move the latter to locking position upon destroying either combination.

4. A combination lock comprising supporting means provided with a shoulder, a bolt slidable upon and guided by the supporting means and provided with an abutment, individual sets of notched rotary tumblers on the supporting means corresponding to different combinations, operating means for said tumbler sets, fence elements individual to said sets of tumblers movable upon the bolt one adapted to engage the shoulder on the supporting means when the bolt is in looking position and cooperating one with another and with the supporting means to hold the bolt in said position upon destroying either combination, the bolt being released upon successful operation of either set of tumblers by the movement of the corresponding fence within the notches thereof, and means on one of the tumblers of one set adapted to engage the abutment on the bolt to move the latter to locking position upon destroying either combination.

5. A combination lock comprising a barrel, a bolt slidably mounted within the barrel, two sets of notched tumblers rotatably supported within the barrel through engagement of the peripheral portions with the surrounding wall of the barrel, one of the tumblers being common to both sets, separate fence elements within the barrel each arranged to move into the notches of the tumblers to which it corresponds and into the notch of said last mentioned tumbler upon successful operation of the corresponding combination, and devices on said last mentioned tumbler one operating upon destroying the combination to return the bolt to locking position and another to move either fence element out of the tumbler notches corresponding thereto, said fence elements cooperating one with another and with the barrel to hold the bolt at locking position upon destroying either combination.

6. A combination lock comprising a barrel, a bolt slidably mounted within the barrel, two sets of notched tumblers rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, one of the tumblers being common to both sets and operatively associated with the bolt, sepa rate fence elements within the barrel each arranged to move into the notches of the tumblers to which it corresponds upon successful operation of the combination corresponding thereto, said bolt operating tumbler upon destroying the combination serving to simultaneously move the bolt to locking position and either fence element out of the tumbler notches corresponding thereto, said fence elements cooperating one with another and with the barrel to hold the bolt against release from looking position upon destroying either combination.

7. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions withthe surrounding wall of the barrel, a bolt movable relative to the barrel, relatively movable fence elements mounted upon the bolt one for each set of tumblers, said fence elements adapted to cooperate one with another and with the barrel to hold the bolt against release upon destroying either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, and rotatably mounted means within the barrel extending through a plurality of the tumblers and movable relative thereto to condition either set of tumblers for move ment of its corresponding fence element to bolt releasing position. 8. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel,

a bolt slidably mounted within the barrel, relatively movable fence elements associated with the bolt one for each set of tumblers, said fence elements adapted to cooperate one with another and with the barrel to hold the bolt against release 40 upon destroying'either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, and common operating means for said sets of tumblers including a dial movable to operate one of the combinations by a partial revolution of the dial in its movement from one setting up position to another.

9. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, a bolt slidably mounted within the barrel and provided with an opening, fence elements pivotally mounted upon the bolt to swing about a common center, one for each set of tumblers, said fence elements adopted to cooperate one with another and with the barrel to hold the bolt against release upon destroying either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, a rotatably mounted member within the barrel extending axially thereof through the opening in the bolt and having parts adapted to effect rotation of said different sets of tumblers to successfully operate the combinations corresponding thereto, and a dial for operating said member.

10. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, a bolt slidably mounted within the barrel,

relatively movable fence elements mounted upon the bolt one for each set of tumblers, said fence elements adapted to cooperate one with another and with the barrel to hold the bolt against release upon destroying either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, means on one of the tumblers cooperating with the bolt independently of the fence elements to move the bolt to locking position upon destroying either combination, and means rotatable within the barrel relative to said different sets of tumblers for moving the tumblers to successfully operate the combinations corresponding thereto.

11. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within 'the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, a 'bolt slidably mounted within the barrel provided with an opening and having a laterally projecting operating part, relatively movable fence elements associated with the bolt one for each set of tumblers, said fence elements adapted to cooperate one with another and with the barrel to hold the bolt against release upon de stroying either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, and a rotatably mounted member within the barrel extending axially thereof through the opening in the bolt and provided with parts adapted to effect rotation of said different sets of tumblers to successfully operate the combinations corresponding thereto, one of said tumblers being adjacent to and substantially parallel with the bolt and having a projecting part for engaging the operating part on the bolt to move the bolt to locking position upon destroying either combination by rotation of said member in one direction.

12. A combination lock comprising a barrel, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, a bolt slidably mounted within the barrel, relatively movable fence elements mountedupon the bolt one for each set of tumblers adapted through cooperation one with another and with the barrel to protect the bolt against release upon destroying either combination, each fence element cooperating with its set of tumblers to release the bolt upon successful operation of the corresponding combination, operating means for conditioning either set of tumblers for movement of its corresponding fence element to bolt releasing position, an abutment on the bolt, a part on one of the tumblers adapted for engagement with said abutment to move the bolt to locking position upon destroying either combination, and a part on said last mentioned tumbler operating when the combination is being destroyed to restore the fence elements to bolt protecting position.

13. A combination lock comprising a barrel, having end closing walls, two sets of tumblers corresponding to different combinations rotatably supported within the barrel through engagement of their peripheral portions with the surrounding wall of the barrel, a slotted bolt slidably mounted within the barrel between the end walls thereof, relatively movable fence elements associated with the bolt within the barrel one for each set of tumblers adapted through cooperation one with another and with the barrel to hold the bolt against release upon destroying either combination, each fence element cooperating With its set of tumblers to release the bolt upon successful operation of the corresponding combination, a rotatably mounted device extending through the tumblers and the slotted bolt and having its opposite ends journaled in the end walls of the barrel, said device being operative to condition either set of tumblers for movement of its corresponding fence element to bolt releasing position, and a dial for operating said device.

GERRIT D. HILL. 

